I have read most of the answers here and this is how I think you should do this. Not sure what you mean by "open the outlet for that" but I am going to assume you mean a cover plate. You would need a vacuum cleaner where you can move the hose to blow air. Have a friend at one end blow air and you can test if the air is coming through the conduit where you think it should come out. If that works, make a "mouse out of a small wad of crumpled paper, tie it with light string - like cheap kite string and use the vacuum to pull it through the conduit. Use this string to pull a heavier string through until you have a pull rope that will be strong enough to pull your cable. It will probably be easiest to pull from the basement as gravity will be working with you instead of against you, however if the vacuum fits better at the other end use that for string, then you can pull cable either way. Bob's your uncle!